Switch lock



C. LEDIN SWITCH LOCK Aug. 28, 1923.

Filed Jam. 20.

' Patented Aug. 28, 1923.

PATENT OFF-ICE,

cHAnLEs LEDIN; or STAMFORD, conunorrcu r, sssisnon ro rrrinyntn & rowna MANUFACTURING COMPANY, or STAMFORD, ocnnnc'rrcor; I

' swrrofi LOCK.

Application filed January 20, 1923. Serial No. sweat.

To all whomfit may concern:

Be itknown that 1, CHARLES LEDIN, a citizen of the United States, and a'resident of Stamford, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Switch Locks; and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others Skilled in the art to which it appertains to make and use the same. i p

This invention relates to improvements in switch locks, and particularly to keyof construction and combinations of parts as hereinafter set forthand pointed out in the claims. I

In the accompanying drawings,'

Figure l is a sectional View, partly in elevation, showing an embodiment of my invention. "1 Figure 2 is a front view. Figure 3 is a rear view. 7 Figure 4- is a rear view showing the easing and illustrating the manner of securing the shell of a cylinder lock therein, and Figures 5, 6, 7 and 8 are detail views. In the drawings, a base block is shown at 1 and carries an electrical. snap switch of any preferred construction located'at 2. The details of the switch contact parts do not constitute any part'oflmy present invention and they need not be specifically shown and described herein. Suflice it to say that the stem of an ordinary electric snap switch is shown at 3 and this is provided with a threaded shank 4 to receive an internally threaded sleeve or bushing 5, which is held against turning by a distorted spring washer (-5 interposed between one end of said sleeve or bushing and the switch stem' 3.

The sleeve or bushing 5 is serrated on its exteriorto form annnnularserics of longitudlnall extendln' teeth or ribs 6 and it passes through a centrally located hole I 1nv disk 8,the wall of said hole being formed with longitudinally extending grooves 9, in which the teeth or ribs 6 mesh and thus the disk 8 is connected with thebushing in such manner that it may impart rotary motion to the switch stem and be capable of movement ina direction relatively to the axis of said stem. A spring 9 is located between the switch structure 2 and the disk 8 and tends normally to press the disk forwardly; e

A casing 10 encloses the mechanism of the device and the base portion of this casing is enlarged as at l0 and provided with inwardly projecting lugs 11 for the accommodationof fastening bolts 12. This portion of the casing may be lined with paper as shown at 13, and the fastening devices may be segregated from the switch and pore tions of ts operating means by partitions lat of paper or other insulating material.

" The enlarged portions of the casing may be provided with holes 15 to permit access to the fastening bolts 12, but these holes are normally *covered by a ring l6 of fiber or other *suitable material. The fiber ring is provided with a recess l7'which may be caused to alignwith theholes 15 to permit access tothe fastening bolts. The fiber ring is so connected with the part which is rotatable by operation of a lock,that it will rotate with such part when the lock is operated with the use. of a proper key, and thus the notch or recess 17 will be brought into alignment with one or the other of the holes in the casingibase 10 only when the mech- V anism is operated with the use of a key.

The fiber r1ng16 is provided with an annular flange 16 which enters the smaller part of the casing and surrounds the disk 8,

with which latter it is connected by means of a pin l8'entering an elongated slot 19 in said flange 16.

A disk of insulating material, preferably of hard fiber is shown at 20 and secured by screws 21 to the disk 8. The disk 20 is provided with opposite recesses which form inclined faces 22 and shoulders23, the latter being disposed parallel with the axis of the disk.

A cylinder lock 2% is located inthe front end portion of thecasing 10 and is provided with lugs or cars through which screws pass and enter lug 27 rigid with the easing. The front end portion of the casing 10 is formed with a suitable opening for the accommodation of the forward end of the cylinder loci: and the plug 28 of said lock is provided at its rear or inner end with two pins or screws 29 located at diametrically opposite sides of the center of said plug and adapted to co-operate, respectively, with the shoulder 23 of the disk 20.

With the construction and arrangement of Hts above described, it willv be underthat when a proper key is inserted into the z-luo; of the lock and turned so as 4 .plug, the cooperation of the pins 29 with the shoulders 23 of the fiber block 20 will cause said block and the block 8 to tur 1 and impart rotary motion, through the sleeve 5 to the stem of the switch and thus o1. the latte When the key is turned be rdly to permit its removal, the backward turning of the lock plug will cause the pins 29 to ri" e on the cam or inclined faces .-.2 .imthus :arce the blocks 20 and 8 back L w; 'ainst the resistance of the spring 9 and without imparting any movement to the switch members. Thus it will be seen that the key may be withdrawn 'Erom the lock without disturbing the positions of the contact points of the switch to which said points may have been set by the initial operation of the Lock.

Having tully described my invention what I claim as new and desire to secure by Letters Patent, is:

l a lock controlled witch, the combination oi switch operating. means, a revoluble member operativcly associated therewith and capable alSo of longitudinal movement, a spring pressing said revoluble member forwardly, a key operated. member, and cam devices between said revoluble member and k y ouerated member.

2. in a lock controlled switch, the combination of switch operating means, a member moimted to rotate with and have longitudinal movement relat ely to said switch operating; means. a s; k n. resisting backward movement of said member, said member provided with a part having a notch having one of its walls inclined and its other wall substant'ally parallel with the axis of said member, and a key operated member operatively associated with the notched part of the first mentioned member.

In a lock controlled switch, the combination of switch operating means provided with a threaded shank, a bushing on said shank provided vith a serrated e1; erior, a disk having an opening receiving said bushand provided with serrations to mesh wi h the serrations oi? said bushing, whereby said disk may turn with the bushing and jmove longitudinally thereof, a cam disk se-- spring normallv pressing said disk forwardly, a cylinder lock secured in the torward portion of the casing, and a projection on the plug 05 said lock to cooperate with said cam disk and rotate the same when turned in one direction and move the same backwardly against the resistance of the spring when turned in the other direction.

5. in a lock controlled switch, the combination with an operating member of the switch and a casing having an enlarged base portion provided with lugs to receive fasten inn means and with holes in line with said fastening means, of a disk movable in the casing; and connected with the operating;- men'iber of the switch so as to turn the same and to move longitudinally thereof, a spring forcing said disk forwardly, an insulating ring located in the enlarged portion of the casing and normally covering the holes in the latter, said ring having a notch or recess and also provided with a flange encir cling said disk and having an elongated slot, a pin projecting from said disk and entering said elongated slot, a cam disk secured to the first mentioned disk, and a cylinder lock secured in the forward portion of the casing and provided with means cooperable with said cam disk.

In testimony whereof, I have signed this specification in the presence of two subscribing witnesses.

CHARLES LEDIN.

Witnesses JOHN FnnYsiNGnR, CI-rAnLns A. BERRY. 

